package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.Result;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    @Transactional
    public void addEmployee(Employee employee) {
        employee.setUpdateTime(LocalDateTime.now());
        employeeMapper.addEmployee(employee);
    }

    @Override
    public Employee findEmployeeByUsername(Employee employee) {
        return employeeMapper.getByUsername(employee.getUsername());
    }

    @Override
    public Page<Employee> employPage(EmployeePageQueryDTO employeePageQueryDTO) {

        return employeeMapper.employPage(employeePageQueryDTO);
    }

    @Override
    @Transactional
    public void startEmployStatus(Integer status, Long id) {
        Employee employeeBuilder = Employee.builder().status(status).id(id)
                .build();
        employeeMapper.updateEmploy(employeeBuilder);
    }

    @Override
    @Transactional
    public Result updateEmployPassword(PasswordEditDTO passwordEditDTO) {
        Employee employee = employeeMapper.getEmployeeById(passwordEditDTO.getEmpId());
        if(employee!=null){
            String oldPwd1 = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());
            String oldPwd2 = employee.getPassword();
            if(oldPwd1.equals(oldPwd2)){
                employeeMapper.updateEmploy(Employee.builder()
                        .id(passwordEditDTO.getEmpId())
                        .password(DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes()))
                        .build()

                );
                return Result.success();
            }
            return Result.error(MessageConstant.OLD_PASSWORD_ERROR);
        }
        return Result.error(MessageConstant.ACCOUNT_NOT_FOUND);
    }

    @Override
    public Result queryByEmployId(Long id) {
        Employee employee = employeeMapper.getEmployeeById(id);
        if(employee!=null){
            EmployeeDTO employeeDTO = new EmployeeDTO();
            BeanUtils.copyProperties(employee, employeeDTO);
            return Result.success(employeeDTO);
        }
        return Result.error(MessageConstant.ACCOUNT_NOT_FOUND);
    }

    @Override
    @Transactional
    public Result updateEmployId(EmployeeDTO employeeDTO) {
        Employee employee = Employee.builder().build();
        BeanUtils.copyProperties(employeeDTO, employee);
        employeeMapper.updateEmploy(employee);
        return Result.success();
    }
}
